SLP004D SENSORTECHNICS | Alldatasheet

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Technical content

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FEATURES

  • 0...4 "H2O
  • Accurate low pressure readings
  • Low cost
  • High impedance bridge
  • Low noise
  • Low power consumption for battery operation BUTTON PACKAGE

APPLICATIONS

  • Medical instrumentation
  • Portable and battery powered equipment
  • Air flow monitoring
  • H V A C
  • Industrial controls GENERAL DESCRIPTION The SLP series of pressure sensors provides low cost measuring for very low pressures. These devices were specifically designed to accurately measure differential and gage pressures of 0 to 4 "H 2O. They are compatible for use with non-corrosive and non-ionic media, such as air and dry gases. The devices allow application of pressure to either side of the dia- phragm and can be used for gage or differential pressure measurements. EQUIVALENT CIRCUIT Scale: 1 cm ½ inch ELECTRICAL CONNECTION OUTPUT+ GROUND OUTPUT- +V S +V S DIFFERENTIAL/GAGE "D4" DIP PACKAGE Note: Polarity applies for positive pressure applied to port P2 (backward gage) output Vs

www.sensortechnics.com ABSOLUTE MAXIMUM RATINGS Min. --- +1700 +34 -2850 -40 --- --- --- --- --- +2100 --- --- --- Typ. --- +2500 +50 -2400 0.5 0.5 0.5 4.65 +2300 4.70 0.2 Max. +5500 +110 -1950 +40 --- 1.0 --- --- --- +2500 --- --- --- Unit "H2O µV/V/"H2O mV ppm/°C mV µV/V°C %FS %FS ms kΩ ppm/°C kΩ %FS µV/V/g Characteristics Operating pressure Sensitivity T A= 25°C Full-scale span 4 "H2O 2 Temperature coefficient of span5,8 Zero pressure offset TA= 25°C Temperature coefficient of offset5 Combined linearity and hysteresis3 Long term stability of offset and sensitivity7 Response time (10 % to 90 %)6 Input resistance TA = 25°C Temperature coefficient of resistance5,8 Output impedance Repeatability Position sensitivity SLP004D PERFORMANCE CHARACTERISTICS 1 WARNING: Due to the delicate nature of these very sensitive devices, some special handling is required . Parts are sensitive to shock and vibration and must be handled with care. Dropping on any hard surface (bench top etc.) can destroy the device. Note 10 "H 2O overpressure. Supply voltage, VS 7.5 VDC Temperature range Operating 0 to 50°C Storage 0 to 70°C Common-mode pressure 150 "H2O Lead temperature (soldering 4 sec.) 250°C Proof pressure 10 "H2O Burst pressure1 5 psi or 150 "H2O Specification notes: Reference conditions: supply voltage, VS = 5 VDC , TA = 25°C, common-mode line pressure = 0 psig, pressure applied to P2. Span is the algebraic difference between the output voltage at full scale pressure and the output at zero pressure. See Definition of Terms: Hysteresis - the maximum output difference at any point within the operating pressure range for increasing and decreasing pressure. Maximum difference in output at any pressure with the operating pressure range an temperature within 0°C to +50°C after: a) 1,000 temperature cycles, 0°C to 50°C b) 1.5 million pressure cycles, 0 psi to full-scale span Slope of the best straight line from 0°C to 50°C. For operation outside this temperature, contact factory for more specific applications information. Response time for a 0 psi to full-scale span pressure step change. 10 % to 90 % rise time. Long term stability over a one year period. This parameter is is not 100 % tested. It is guaranteed by process design and tested on a sample basis only. If the maximum burst pressure is exceeded, even momentarily, the package may leak or burst, or the pressure sensing die may fracture.

www.sensortechnics.com General Information The SLP family of pressure sensors function as a wheatstone bridge. When pressure applied to the device the resistors in the arms of the bridge change as shown in Figure 1. The resulting differential output voltage, V is easily shown to by V0 = VB x ∆R. Since the change in resistance is directly propor- tional to pressure, V 0 can be written as: V0 = S x P x VB + VOS TYPICAL PERFORMANCE CHARACTERISTICS where: V0 is the output voltage in mV S is the sensitivity in mV/V psi P is the pressure in psi V B is the bridge voltage in volts VOS is the offset error (the differential output voltage when the applied pressure is zero). For a complete application discussion see SenSym´s SCC series datasheet. Figure I

APPLICATION INFORMATION

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ORDERING INFORMATION

0 to 4 "H2O SenSym and Sensortechnics reserve the right to make changes to any products herein. SenSym and Sensortechnics do not assume any liability arising out of the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. PHYSICAL DIMENSIONS Button package Order part number DIP package SLP004DD4 mass: 1 g dimensions in inches (mm) mass: 1 g dimensions in inches (mm) D4-housing 0.020 typ. (0.51) 0.110 typ. (2.79) 0.380 (9.65) 0.285 (7.24) 0.090 typ. (2.29) 0.470 (11.94)0.050 typ. (1.27) 0.550 (13.97) 0.600 (15.24) 0.01 (0.25) 0.100 typ. (2.54) 0.300 (7.62) 0.070 (1.78) 0.135 (3.43) 0.250 (6.35)